docs: def get_encoder(self, content_type):
          """
          Get the encoding function for the provided content type for
          this bucket.
  
          :param content_type: the requested media type
          :type content_type: str
          :param content_type: Content type requested
          """
          if content_type in self._encoders:
              return self._encoders[content_type]
          else:
              return self._client.get_encoder(content_type)